Buggy code:
public class ClassFileReader extends ClassFileStruct implements AttributeNamesConstants , IBinaryType { public static ClassFileReader read ( File file ) throws IOException , ClassFormatException { } public static ClassFileReader read ( File file , boolean fullyInitialize ) throws IOException , ClassFormatException { } public static ClassFileReader read ( ZipFile zip , String filename ) throws IOException , ClassFormatException { } public static ClassFileReader read ( ZipFile zip , String filename , boolean fullyInitialize ) throws IOException , ClassFormatException { } public static ClassFileReader read ( String fileName ) throws IOException , ClassFormatException { } public static ClassFileReader read ( String fileName , boolean fullyInitialize ) throws IOException , ClassFormatException { } private int accessFlags ; private char [ ] classFileName ; private char [ ] className ; private int classNameIndex ; private int constantPoolCount ; private int [ ] constantPoolOffsets ; private FieldInfo [ ] fields ; private int fieldsCount ; private InnerClassInfo innerInfo ; private int innerInfoIndex ; private InnerClassInfo [ ] innerInfos ; private char [ ] [ ] interfaceNames ; private int interfacesCount ; private MethodInfo [ ] methods ; private int methodsCount ; private char [ ] signature ; private char [ ] sourceFileName ; private char [ ] superclassName ; private long tagBits ; private long version ; public ClassFileReader ( byte [ ] classFileBytes , char [ ] fileName ) throws ClassFormatException { } public ClassFileReader ( byte [ ] classFileBytes , char [ ] fileName , boolean fullyInitialize ) throws ClassFormatException { } public int accessFlags ( ) { } private int decodeAnnotation ( int offset ) { } private int decodeElementValue ( int offset ) { } private int decodeElementValueForJavaLangAnnotationTarget ( int offset ) { } private int decodeElementValueForJavaLangAnnotationRetention ( int offset ) { } private void decodeStandardAnnotations ( int offset ) { } private char [ ] getConstantClassNameAt ( int constantPoolIndex ) { } public int [ ] getConstantPoolOffsets ( ) { } public char [ ] getEnclosingTypeName ( ) { } public IBinaryField [ ] getFields ( ) { } public char [ ] getFileName ( ) { } public char [ ] getGenericSignature ( ) { } public char [ ] getInnerSourceName ( ) { } public char [ ] [ ] getInterfaceNames ( ) { } public int getKind ( ) { } public IBinaryNestedType [ ] getMemberTypes ( ) { } public IBinaryMethod [ ] getMethods ( ) { } public int getModifiers ( ) { } public char [ ] getName ( ) { } public char [ ] getSuperclassName ( ) { } public long getTagBits ( ) { } public long getVersion ( ) { } private boolean hasNonSyntheticFieldChanges ( FieldInfo [ ] currentFieldInfos , FieldInfo [ ] otherFieldInfos ) { } private boolean hasNonSyntheticMethodChanges ( MethodInfo [ ] currentMethodInfos , MethodInfo [ ] otherMethodInfos ) { } public boolean hasStructuralChanges ( byte [ ] newBytes ) { } public boolean hasStructuralChanges ( byte [ ] newBytes , boolean orderRequired , boolean excludesSynthetic ) { try { ClassFileReader newClassFile = new ClassFileReader ( newBytes , this . classFileName ) ; if ( ( this . getModifiers ( ) ) != ( newClassFile . getModifiers ( ) ) ) return true ; <START_BUG> if ( ( ( ( this . getTagBits ( ) ) & ( TagBits . AnnotationTargetMASK ) ) | ( TagBits . AnnotationDeprecated ) ) != ( ( ( newClassFile . getTagBits ( ) ) & ( TagBits . AnnotationTargetMASK ) ) | ( TagBits . AnnotationDeprecated ) ) ) <END_BUG> return true ; if ( ! ( CharOperation . equals ( this . getSuperclassName ( ) , newClassFile . getSuperclassName ( ) ) ) ) return true ; char [ ] [ ] newInterfacesNames = newClassFile . getInterfaceNames ( ) ; if ( ( this . interfaceNames ) != newInterfacesNames ) { int newInterfacesLength = ( newInterfacesNames == null ) ? 0 : newInterfacesNames . length ; if ( newInterfacesLength != ( this . interfacesCount ) ) return true ; for ( int i = 0 , max = this . interfacesCount ; i < max ; i ++ ) if ( ! ( CharOperation . equals ( this . interfaceNames [ i ] , newInterfacesNames [ i ] ) ) ) return true ; } IBinaryNestedType [ ] currentMemberTypes = this . getMemberTypes ( ) ; IBinaryNestedType [ ] otherMemberTypes = newClassFile . getMemberTypes ( ) ; if ( currentMemberTypes != otherMemberTypes ) { int currentMemberTypeLength = ( currentMemberTypes == null ) ? 0 : currentMemberTypes . length ; int otherMemberTypeLength = ( otherMemberTypes == null ) ? 0 : otherMemberTypes . length ; if ( currentMemberTypeLength != otherMemberTypeLength ) return true ; for ( int i = 0 ; i < currentMemberTypeLength ; i ++ ) if ( ( ! ( CharOperation . equals ( currentMemberTypes [ i ] . getName ( ) , otherMemberTypes [ i ] . getName ( ) ) ) ) || ( ( currentMemberTypes [ i ] . getModifiers ( ) ) != ( otherMemberTypes [ i ] . getModifiers ( ) ) ) ) return true ; } FieldInfo [ ] otherFieldInfos = ( ( FieldInfo [ ] ) ( newClassFile . getFields ( ) ) ) ; int otherFieldInfosLength = ( otherFieldInfos == null ) ? 0 : otherFieldInfos . length ; boolean compareFields = true ; if ( ( this . fieldsCount ) == otherFieldInfosLength ) { int i = 0 ; for ( ; i < ( this . fieldsCount ) ; i ++ ) if ( hasStructuralFieldChanges ( this . fields [ i ] , otherFieldInfos [ i ] ) ) break ; if ( ( ( compareFields = i != ( this . fieldsCount ) ) && ( ! orderRequired ) ) && ( ! excludesSynthetic ) ) return true ; } if ( compareFields ) { if ( ( ( this . fieldsCount ) != otherFieldInfosLength ) && ( ! excludesSynthetic ) ) return true ;

Fix:
if ( ( ( ( ( this . getTagBits ( ) ) & ( TagBits . AnnotationTargetMASK ) ) | ( TagBits . AnnotationDeprecated ) ) | ( TagBits . AnnotationRetentionMASK ) ) != ( ( ( ( newClassFile . getTagBits ( ) ) & ( TagBits . AnnotationTargetMASK ) ) | ( TagBits . AnnotationDeprecated ) ) | ( TagBits . AnnotationRetentionMASK ) ) )